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math.CO2003
On the Entropy and Letter Frequencies of Ternary Square-Free Words
Christoph Richard, Uwe Grimm
We enumerate all ternary length-l square-free words, which are words avoiding squares of words up to length l, for l<=24. We analyse the singular behaviour of the corresponding gen…
math.CO2003★ 33 cited
Bravais colourings of planar modules with N-fold symmetry
Michael Baake, Uwe Grimm
The first step in investigating colour symmetries for periodic and aperiodic systems is the determination of all colouring schemes that are compatible with the symmetry group of th…